Realistically, do not expect a new one until either late this year or early next year. You can get a used 2012 model on ebay for $1400, and for cheaper if you are ok with scratches. You can find them for as low as $1200 on craigslist. It will really perform about as well as a 2013 model, and in some tasks it will be better. It is exactly the same externally as the 2013 model. The CPU on the 2013 model is about 3% faster, and the GPU is a little bit slower. It has PCIE flash and AC wifi, those are the two big differences.
Get a used 2012 model, the 2013 models are really not much different unless you get the maxed out version. Plus, the depreciation on a used notebook is a lot better than if you get one new. When a new one comes out, you could sell the 2012 one for a $200 loss at most if you really wanted the new one.
Just something to think about, I would personally just get a 2012 model and stick with it. They are gorgeous machines, and they are reasonably priced for what you get.
Matt
